Machine



- 3 Sheets-Sheet; 1.

F. CASS. NAILING MACHINE'.

(No Model.)

Patented Nov. 1l, 1884.

,1g/r 9W? M weeg/me (No Model.) 3 Sheets-Sheet, 2.

G. P. CASS.

NAILING MACHINE. 110.307,91'2. f Patented NOV. 11.1884.

(No Model.) 3 Sheets-Sheet 3.`

G. P. CASS.

NAILING MACHINE.

No. 307,912. Patented Nov. 1,1. 18.84.

Ihn-ran Sra-iras Partnr @lterer-Q,

GEORGE E. CASS, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND HUGHVHITE, OF SAME PLACE.

NAILiNe-MACHINE.

SECIFICATION forming part of Letters Patent No. 307,912, dated November11, 1884.

Application filed December 10, 1883. (No iuodcL i To @H whom t muyconcern.- the ratchet-bar G, the end of which engages Be it known thatI, GEORGE E. CASS, a citiwith a pin, g, on the sliding block D. The zenof the United States, residing in Chicago, lower or horizontal arm,f',of the bent lever in the county of Cook and State of Illinois, Fprojectsunder the treadle E, or aprojection, 5 have invented a new and usefulImprovement e', thereon, so as to be operated by the treadle inHeel-Nailing Machines, of which the folwhen the same is depressed bythefoot. The lowing is a specification. treadle E is provided with a bentarm, e, to My invention relates to devices for reciprothe end of which aspring, E', secured at one eating the cross-head of heel-nailingmachines end to a frame, is attached, so as to automati- Io from thecrank-arm, which is driven continu cally raise the treadle when theoperator lifts 6o ously. his foot therefrom.

I n the accompanying drawings, which form H is a spring, secured at oneend to the frame a part of this specification, and in which simiof themachine and at the other to the sliding` -lar letters of referenceindicate like parts block D, so as to retract said block from bewherevershown, Figure l is a side elevation neath thc crank-arm the instant thetreadle is 6 5 of that portion of a heel-nailing machine to released.

which my invention is applied. Fig.,2 is a H' is a secondary orauxiliary spring, at-

plan view of the same. Fig. 8 is an elevation tached at one end to thecross-bar B' 'and at looking from the line3 3 of Fig. l. Fig. 4 is theother to the sliding` block D, so as to in- 2o an enlarged section online 4 4 of Fig. 2, and sure the retraction of said block in case the 70Fig. 5 is a detail perspective view of the lespring G shouldaccidentallybe broken or ver and ratchet-bar. fail to act. v

In the drawings, A represents the frame of I am aware that heretoforevarious levers, the machine; B B, the rods connecting the cams, anddeviceshavebeen employed in heel- 25 cross-head, which is not shown,with the crossnailing machines formoving the sliding block 75 bar B'. Dboth forward and backward; but such de- C is the crank-arm by which thccross-head vices I have found from practical operation is reciprocatedfrom time to time, as the opof the machines to be exceedingly liable toerator may require, through the crossbar B' get out of order, and failto retract the block 3o and the rods B B. The crank-shaft which D at thepropertime, and thus occasionbreak- So drives the crank-arm C revolvescontinuously, age and injury to the machine, as well as danso that thelower end of the crankarm C rcger to the persons operating the same. Byciprocates continuously between the slotted means ofthe spring the blockD in my invenbrackets b on the cross-bar B', the crankshaft tion isalways instantly retracted the moment f being provided with a pin, c,which lits in the the operator ceases to press upon the treadle, 85

slots b' in said brackets. Vhen the operator so that there can be nodanger of injury either desires to reciprocate the cross-head, the blockto the machine itself' or to the attendants opor dog D is moved forwardunder the end of erating it.

the crank-arm, so that the crank-arm will re I claim- 40 ciprocate thecross-bar B', and thus the crossl. The combination, in a heel-nailingma- 9o head. The dog D slides on a bed-plate, D', chine, of thecrank-arm C, the lower end of which is provided with atongue, d, whichfits which reciprocates vertically within suitable into a correspondinggroove or way, d', on the guides, cross-bar B', connected with thecrossdog. The dog or block D is secured upon its head of the machine,sliding block D, a treadle- 45 bed by a screw or bolt, di, which iitsinto and-lever connection for moving said block 95 longitudinal slot inthe dog, and is screwed under the crank-arn1, and a spr-ing connectedinto the bed. The block D is moved forward with said block forretracting the same, saidA under the crank-arm by means of a treadle,sliding block being of greater thickness than E, which operates the bentlever E, pivoted to the length of stroke of the crank-arn1, so that 5othe frame of the machine at f, which actuates when said block isretracted by the spring 10o the crank-arm may reciprocate withoutoperating the crossbar and cross-head, substair tially as specified.

2. The combination, in a heel-nailing niachine, of the cross-bar B',provided with slotted brackets b, crank-arm C, provided with the pin c,reciprocating between saidbrackets, sliding block D, treadle E, providedwith bent arms c, and spring E', bent lever F, provided With horizontalarm f', projecting under said treadle, ratchet-bar G, and springs H andH', for retracting said sliding block D, snbstan tially as specified.

3. In a hee1-nai1ing machine, the combination, with the crank-arm andcross-bar of the machine, of the sliding block D, means for sliding andholding` said block D under the crankarm, and aspring for retractiug thesame, said cross-bar being provided with slotted brackets b, and saidcrank-arm having a pin, c, at its end fitting in the slots of saidbrackets, substantially as specified.

Chicago, Illinois, December 7, A. D. 1883.

GEORGE F. CASS.

Witnesses:

TAYLOR E. BROWN, H. M. MUNDAY.

